diff --git a/okhttp/src/main/java/com/squareup/okhttp/OkHttpClient.java b/okhttp/src/main/java/com/squareup/okhttp/OkHttpClient.java
index 1d18f3c5b..c234de512 100644
--- a/okhttp/src/main/java/com/squareup/okhttp/OkHttpClient.java
+++ b/okhttp/src/main/java/com/squareup/okhttp/OkHttpClient.java
@@ -21,6 +21,7 @@ import com.squareup.okhttp.internal.http.HttpURLConnectionImpl;
 import com.squareup.okhttp.internal.http.HttpsURLConnectionImpl;
 import com.squareup.okhttp.internal.http.OkResponseCache;
 import com.squareup.okhttp.internal.http.OkResponseCacheAdapter;
+import com.squareup.okhttp.internal.tls.OkHostnameVerifier;
 import java.net.CookieHandler;
 import java.net.HttpURLConnection;
 import java.net.Proxy;
@@ -283,7 +284,7 @@ public final class OkHttpClient {
         : HttpsURLConnection.getDefaultSSLSocketFactory();
     result.hostnameVerifier = hostnameVerifier != null
         ? hostnameVerifier
-        : HttpsURLConnection.getDefaultHostnameVerifier();
+        : new OkHostnameVerifier();
     result.authenticator = authenticator != null
         ? authenticator
         : HttpAuthenticator.SYSTEM_DEFAULT;
diff --git a/okhttp/src/main/java/com/squareup/okhttp/internal/tls/DistinguishedNameParser.java b/okhttp/src/main/java/com/squareup/okhttp/internal/tls/DistinguishedNameParser.java
new file mode 100644
index 000000000..8dab23f5f
--- /dev/null
+++ b/okhttp/src/main/java/com/squareup/okhttp/internal/tls/DistinguishedNameParser.java
@@ -0,0 +1,407 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.squareup.okhttp.internal.tls;
+
+import javax.security.auth.x500.X500Principal;
+
+/**
+ * A distinguished name (DN) parser. This parser only supports extracting a
+ * string value from a DN. It doesn't support values in the hex-string style.
+ */
+final class DistinguishedNameParser {
+  private final String dn;
+  private final int length;
+  private int pos;
+  private int beg;
+  private int end;
+
+  /** tmp vars to store positions of the currently parsed item */
+  private int cur;
+
+  /** distinguished name chars */
+  private char[] chars;
+
+  public DistinguishedNameParser(X500Principal principal) {
+    // RFC2253 is used to ensure we get attributes in the reverse
+    // order of the underlying ASN.1 encoding, so that the most
+    // significant values of repeated attributes occur first.
+    this.dn = principal.getName(X500Principal.RFC2253);
+    this.length = this.dn.length();
+  }
+
+  // gets next attribute type: (ALPHA 1*keychar) / oid
+  private String nextAT() {
+    // skip preceding space chars, they can present after
+    // comma or semicolon (compatibility with RFC 1779)
+    for (; pos < length && chars[pos] == ' '; pos++) {
+    }
+    if (pos == length) {
+      return null; // reached the end of DN
+    }
+
+    // mark the beginning of attribute type
+    beg = pos;
+
+    // attribute type chars
+    pos++;
+    for (; pos < length && chars[pos] != '=' && chars[pos] != ' '; pos++) {
+      // we don't follow exact BNF syntax here:
+      // accept any char except space and '='
+    }
+    if (pos >= length) {
+      throw new IllegalStateException("Unexpected end of DN: " + dn);
+    }
+
+    // mark the end of attribute type
+    end = pos;
+
+    // skip trailing space chars between attribute type and '='
+    // (compatibility with RFC 1779)
+    if (chars[pos] == ' ') {
+      for (; pos < length && chars[pos] != '=' && chars[pos] == ' '; pos++) {
+      }
+
+      if (chars[pos] != '=' || pos == length) {
+        throw new IllegalStateException("Unexpected end of DN: " + dn);
+      }
+    }
+
+    pos++; //skip '=' char
+
+    // skip space chars between '=' and attribute value
+    // (compatibility with RFC 1779)
+    for (; pos < length && chars[pos] == ' '; pos++) {
+    }
+
+    // in case of oid attribute type skip its prefix: "oid." or "OID."
+    // (compatibility with RFC 1779)
+    if ((end - beg > 4) && (chars[beg + 3] == '.')
+        && (chars[beg] == 'O' || chars[beg] == 'o')
+        && (chars[beg + 1] == 'I' || chars[beg + 1] == 'i')
+        && (chars[beg + 2] == 'D' || chars[beg + 2] == 'd')) {
+      beg += 4;
+    }
+
+    return new String(chars, beg, end - beg);
+  }
+
+  // gets quoted attribute value: QUOTATION *( quotechar / pair ) QUOTATION
+  private String quotedAV() {
+    pos++;
+    beg = pos;
+    end = beg;
+    while (true) {
+
+      if (pos == length) {
+        throw new IllegalStateException("Unexpected end of DN: " + dn);
+      }
+
+      if (chars[pos] == '"') {
+        // enclosing quotation was found
+        pos++;
+        break;
+      } else if (chars[pos] == '\\') {
+        chars[end] = getEscaped();
+      } else {
+        // shift char: required for string with escaped chars
+        chars[end] = chars[pos];
+      }
+      pos++;
+      end++;
+    }
+
+    // skip trailing space chars before comma or semicolon.
+    // (compatibility with RFC 1779)
+    for (; pos < length && chars[pos] == ' '; pos++) {
+    }
+
+    return new String(chars, beg, end - beg);
+  }
+
+  // gets hex string attribute value: "#" hexstring
+  private String hexAV() {
+    if (pos + 4 >= length) {
+      // encoded byte array  must be not less then 4 c
+      throw new IllegalStateException("Unexpected end of DN: " + dn);
+    }
+
+    beg = pos; // store '#' position
+    pos++;
+    while (true) {
+
+      // check for end of attribute value
+      // looks for space and component separators
+      if (pos == length || chars[pos] == '+' || chars[pos] == ','
+          || chars[pos] == ';') {
+        end = pos;
+        break;
+      }
+
+      if (chars[pos] == ' ') {
+        end = pos;
+        pos++;
+        // skip trailing space chars before comma or semicolon.
+        // (compatibility with RFC 1779)
+        for (; pos < length && chars[pos] == ' '; pos++) {
+        }
+        break;
+      } else if (chars[pos] >= 'A' && chars[pos] <= 'F') {
+        chars[pos] += 32; //to low case
+      }
+
+      pos++;
+    }
+
+    // verify length of hex string
+    // encoded byte array  must be not less then 4 and must be even number
+    int hexLen = end - beg; // skip first '#' char
+    if (hexLen < 5 || (hexLen & 1) == 0) {
+      throw new IllegalStateException("Unexpected end of DN: " + dn);
+    }
+
+    // get byte encoding from string representation
+    byte[] encoded = new byte[hexLen / 2];
+    for (int i = 0, p = beg + 1; i < encoded.length; p += 2, i++) {
+      encoded[i] = (byte) getByte(p);
+    }
+
+    return new String(chars, beg, hexLen);
+  }
+
+  // gets string attribute value: *( stringchar / pair )
+  private String escapedAV() {
+    beg = pos;
+    end = pos;
+    while (true) {
+      if (pos >= length) {
+        // the end of DN has been found
+        return new String(chars, beg, end - beg);
+      }
+
+      switch (chars[pos]) {
+        case '+':
+        case ',':
+        case ';':
+          // separator char has been found
+          return new String(chars, beg, end - beg);
+        case '\\':
+          // escaped char
+          chars[end++] = getEscaped();
+          pos++;
+          break;
+        case ' ':
+          // need to figure out whether space defines
+          // the end of attribute value or not
+          cur = end;
+
+          pos++;
+          chars[end++] = ' ';
+
+          for (; pos < length && chars[pos] == ' '; pos++) {
+            chars[end++] = ' ';
+          }
+          if (pos == length || chars[pos] == ',' || chars[pos] == '+'
+              || chars[pos] == ';') {
+            // separator char or the end of DN has been found
+            return new String(chars, beg, cur - beg);
+          }
+          break;
+        default:
+          chars[end++] = chars[pos];
+          pos++;
+      }
+    }
+  }
+
+  // returns escaped char
+  private char getEscaped() {
+    pos++;
+    if (pos == length) {
+      throw new IllegalStateException("Unexpected end of DN: " + dn);
+    }
+
+    switch (chars[pos]) {
+      case '"':
+      case '\\':
+      case ',':
+      case '=':
+      case '+':
+      case '<':
+      case '>':
+      case '#':
+      case ';':
+      case ' ':
+      case '*':
+      case '%':
+      case '_':
+        //FIXME: escaping is allowed only for leading or trailing space char
+        return chars[pos];
+      default:
+        // RFC doesn't explicitly say that escaped hex pair is
+        // interpreted as UTF-8 char. It only contains an example of such DN.
+        return getUTF8();
+    }
+  }
+
+  // decodes UTF-8 char
+  // see http://www.unicode.org for UTF-8 bit distribution table
+  private char getUTF8() {
+    int res = getByte(pos);
+    pos++; //FIXME tmp
+
+    if (res < 128) { // one byte: 0-7F
+      return (char) res;
+    } else if (res >= 192 && res <= 247) {
+
+      int count;
+      if (res <= 223) { // two bytes: C0-DF
+        count = 1;
+        res = res & 0x1F;
+      } else if (res <= 239) { // three bytes: E0-EF
+        count = 2;
+        res = res & 0x0F;
+      } else { // four bytes: F0-F7
+        count = 3;
+        res = res & 0x07;
+      }
+
+      int b;
+      for (int i = 0; i < count; i++) {
+        pos++;
+        if (pos == length || chars[pos] != '\\') {
+          return 0x3F; //FIXME failed to decode UTF-8 char - return '?'
+        }
+        pos++;
+
+        b = getByte(pos);
+        pos++; //FIXME tmp
+        if ((b & 0xC0) != 0x80) {
+          return 0x3F; //FIXME failed to decode UTF-8 char - return '?'
+        }
+
+        res = (res << 6) + (b & 0x3F);
+      }
+      return (char) res;
+    } else {
+      return 0x3F; //FIXME failed to decode UTF-8 char - return '?'
+    }
+  }
+
+  // Returns byte representation of a char pair
+  // The char pair is composed of DN char in
+  // specified 'position' and the next char
+  // According to BNF syntax:
+  // hexchar    = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
+  //                    / "a" / "b" / "c" / "d" / "e" / "f"
+  private int getByte(int position) {
+    if (position + 1 >= length) {
+      throw new IllegalStateException("Malformed DN: " + dn);
+    }
+
+    int b1, b2;
+
+    b1 = chars[position];
+    if (b1 >= '0' && b1 <= '9') {
+      b1 = b1 - '0';
+    } else if (b1 >= 'a' && b1 <= 'f') {
+      b1 = b1 - 87; // 87 = 'a' - 10
+    } else if (b1 >= 'A' && b1 <= 'F') {
+      b1 = b1 - 55; // 55 = 'A' - 10
+    } else {
+      throw new IllegalStateException("Malformed DN: " + dn);
+    }
+
+    b2 = chars[position + 1];
+    if (b2 >= '0' && b2 <= '9') {
+      b2 = b2 - '0';
+    } else if (b2 >= 'a' && b2 <= 'f') {
+      b2 = b2 - 87; // 87 = 'a' - 10
+    } else if (b2 >= 'A' && b2 <= 'F') {
+      b2 = b2 - 55; // 55 = 'A' - 10
+    } else {
+      throw new IllegalStateException("Malformed DN: " + dn);
+    }
+
+    return (b1 << 4) + b2;
+  }
+
+  /**
+   * Parses the DN and returns the most significant attribute value
+   * for an attribute type, or null if none found.
+   *
+   * @param attributeType attribute type to look for (e.g. "ca")
+   */
+  public String findMostSpecific(String attributeType) {
+    // Initialize internal state.
+    pos = 0;
+    beg = 0;
+    end = 0;
+    cur = 0;
+    chars = dn.toCharArray();
+
+    String attType = nextAT();
+    if (attType == null) {
+      return null;
+    }
+    while (true) {
+      String attValue = "";
+
+      if (pos == length) {
+        return null;
+      }
+
+      switch (chars[pos]) {
+        case '"':
+          attValue = quotedAV();
+          break;
+        case '#':
+          attValue = hexAV();
+          break;
+        case '+':
+        case ',':
+        case ';': // compatibility with RFC 1779: semicolon can separate RDNs
+          //empty attribute value
+          break;
+        default:
+          attValue = escapedAV();
+      }
+
+      // Values are ordered from most specific to least specific
+      // due to the RFC2253 formatting. So take the first match
+      // we see.
+      if (attributeType.equalsIgnoreCase(attType)) {
+        return attValue;
+      }
+
+      if (pos >= length) {
+        return null;
+      }
+
+      if (chars[pos] == ',' || chars[pos] == ';') {
+      } else if (chars[pos] != '+') {
+        throw new IllegalStateException("Malformed DN: " + dn);
+      }
+
+      pos++;
+      attType = nextAT();
+      if (attType == null) {
+        throw new IllegalStateException("Malformed DN: " + dn);
+      }
+    }
+  }
+}
diff --git a/okhttp/src/main/java/com/squareup/okhttp/internal/tls/OkHostnameVerifier.java b/okhttp/src/main/java/com/squareup/okhttp/internal/tls/OkHostnameVerifier.java
new file mode 100644
index 000000000..e111f22ac
--- /dev/null
+++ b/okhttp/src/main/java/com/squareup/okhttp/internal/tls/OkHostnameVerifier.java
@@ -0,0 +1,188 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You under the Apache License, Version 2.0
+ *  (the "License"); you may not use this file except in compliance with
+ *  the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package com.squareup.okhttp.internal.tls;
+
+import java.security.cert.Certificate;
+import java.security.cert.CertificateParsingException;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Locale;
+import java.util.regex.Pattern;
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLException;
+import javax.net.ssl.SSLSession;
+import javax.security.auth.x500.X500Principal;
+
+/**
+ * A HostnameVerifier consistent with <a
+ * href="http://www.ietf.org/rfc/rfc2818.txt">RFC 2818</a>.
+ */
+public final class OkHostnameVerifier implements HostnameVerifier {
+  /**
+   * Quick and dirty pattern to differentiate IP addresses from hostnames. This
+   * is an approximation of Android's private InetAddress#isNumeric API.
+   *
+   * <p>This matches IPv6 addresses as a hex string containing at least one
+   * colon, and possibly including dots after the first colon. It matches IPv4
+   * addresses as strings containing only decimal digits and dots. This pattern
+   * matches strings like "a:.23" and "54" that are neither IP addresses nor
+   * hostnames; they will be verified as IP addresses (which is a more strict
+   * verification).
+   */
+  private static final Pattern VERIFY_AS_IP_ADDRESS = Pattern.compile(
+      "([0-9a-fA-F]*:[0-9a-fA-F:.]*)|([\\d.]+)");
+
+  private static final int ALT_DNS_NAME = 2;
+  private static final int ALT_IPA_NAME = 7;
+
+  public final boolean verify(String host, SSLSession session) {
+    try {
+      Certificate[] certificates = session.getPeerCertificates();
+      return verify(host, (X509Certificate) certificates[0]);
+    } catch (SSLException e) {
+      return false;
+    }
+  }
+
+  public boolean verify(String host, X509Certificate certificate) {
+    return verifyAsIpAddress(host)
+        ? verifyIpAddress(host, certificate)
+        : verifyHostName(host, certificate);
+  }
+
+  static boolean verifyAsIpAddress(String host) {
+    return VERIFY_AS_IP_ADDRESS.matcher(host).matches();
+  }
+
+  /**
+   * Returns true if {@code certificate} matches {@code ipAddress}.
+   */
+  private boolean verifyIpAddress(String ipAddress, X509Certificate certificate) {
+    for (String altName : getSubjectAltNames(certificate, ALT_IPA_NAME)) {
+      if (ipAddress.equalsIgnoreCase(altName)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Returns true if {@code certificate} matches {@code hostName}.
+   */
+  private boolean verifyHostName(String hostName, X509Certificate certificate) {
+    hostName = hostName.toLowerCase(Locale.US);
+    boolean hasDns = false;
+    for (String altName : getSubjectAltNames(certificate, ALT_DNS_NAME)) {
+      hasDns = true;
+      if (verifyHostName(hostName, altName)) {
+        return true;
+      }
+    }
+
+    if (!hasDns) {
+      X500Principal principal = certificate.getSubjectX500Principal();
+      // RFC 2818 advises using the most specific name for matching.
+      String cn = new DistinguishedNameParser(principal).findMostSpecific("cn");
+      if (cn != null) {
+        return verifyHostName(hostName, cn);
+      }
+    }
+
+    return false;
+  }
+
+  private List<String> getSubjectAltNames(X509Certificate certificate, int type) {
+    List<String> result = new ArrayList<String>();
+    try {
+      Collection<?> subjectAltNames = certificate.getSubjectAlternativeNames();
+      if (subjectAltNames == null) {
+        return Collections.emptyList();
+      }
+      for (Object subjectAltName : subjectAltNames) {
+        List<?> entry = (List<?>) subjectAltName;
+        if (entry == null || entry.size() < 2) {
+          continue;
+        }
+        Integer altNameType = (Integer) entry.get(0);
+        if (altNameType == null) {
+          continue;
+        }
+        if (altNameType == type) {
+          String altName = (String) entry.get(1);
+          if (altName != null) {
+            result.add(altName);
+          }
+        }
+      }
+      return result;
+    } catch (CertificateParsingException e) {
+      return Collections.emptyList();
+    }
+  }
+
+  /**
+   * Returns true if {@code hostName} matches the name or pattern {@code cn}.
+   *
+   * @param hostName lowercase host name.
+   * @param cn certificate host name. May include wildcards like
+   *     {@code *.android.com}.
+   */
+  public boolean verifyHostName(String hostName, String cn) {
+    if (hostName == null || hostName.isEmpty() || cn == null || cn.isEmpty()) {
+      return false;
+    }
+
+    cn = cn.toLowerCase(Locale.US);
+
+    if (!cn.contains("*")) {
+      return hostName.equals(cn);
+    }
+
+    if (cn.startsWith("*.") && hostName.regionMatches(0, cn, 2, cn.length() - 2)) {
+      return true; // "*.foo.com" matches "foo.com"
+    }
+
+    int asterisk = cn.indexOf('*');
+    int dot = cn.indexOf('.');
+    if (asterisk > dot) {
+      return false; // malformed; wildcard must be in the first part of the cn
+    }
+
+    if (!hostName.regionMatches(0, cn, 0, asterisk)) {
+      return false; // prefix before '*' doesn't match
+    }
+
+    int suffixLength = cn.length() - (asterisk + 1);
+    int suffixStart = hostName.length() - suffixLength;
+    if (hostName.indexOf('.', asterisk) < suffixStart) {
+      // TODO: remove workaround for *.clients.google.com http://b/5426333
+      if (!hostName.endsWith(".clients.google.com")) {
+        return false; // wildcard '*' can't match a '.'
+      }
+    }
+
+    if (!hostName.regionMatches(suffixStart, cn, asterisk + 1, suffixLength)) {
+      return false; // suffix after '*' doesn't match
+    }
+
+    return true;
+  }
+}
diff --git a/okhttp/src/test/java/com/squareup/okhttp/internal/tls/FakeSSLSession.java b/okhttp/src/test/java/com/squareup/okhttp/internal/tls/FakeSSLSession.java
new file mode 100644
index 000000000..215e968df
--- /dev/null
+++ b/okhttp/src/test/java/com/squareup/okhttp/internal/tls/FakeSSLSession.java
@@ -0,0 +1,120 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+package com.squareup.okhttp.internal.tls;
+
+import java.security.Principal;
+import java.security.cert.Certificate;
+import javax.net.ssl.SSLPeerUnverifiedException;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.SSLSessionContext;
+import javax.security.cert.X509Certificate;
+
+final class FakeSSLSession implements SSLSession {
+  private final Certificate[] certificates;
+
+  public FakeSSLSession(Certificate... certificates) throws Exception {
+    this.certificates = certificates;
+  }
+
+  public int getApplicationBufferSize() {
+    throw new UnsupportedOperationException();
+  }
+
+  public String getCipherSuite() {
+    throw new UnsupportedOperationException();
+  }
+
+  public long getCreationTime() {
+    throw new UnsupportedOperationException();
+  }
+
+  public byte[] getId() {
+    throw new UnsupportedOperationException();
+  }
+
+  public long getLastAccessedTime() {
+    throw new UnsupportedOperationException();
+  }
+
+  public Certificate[] getLocalCertificates() {
+    throw new UnsupportedOperationException();
+  }
+
+  public Principal getLocalPrincipal() {
+    throw new UnsupportedOperationException();
+  }
+
+  public int getPacketBufferSize() {
+    throw new UnsupportedOperationException();
+  }
+
+  public Certificate[] getPeerCertificates() throws SSLPeerUnverifiedException {
+    if (certificates.length == 0) {
+      throw new SSLPeerUnverifiedException("peer not authenticated");
+    } else {
+      return certificates;
+    }
+  }
+
+  public X509Certificate[] getPeerCertificateChain() throws SSLPeerUnverifiedException {
+    throw new UnsupportedOperationException();
+  }
+
+  public String getPeerHost() {
+    throw new UnsupportedOperationException();
+  }
+
+  public int getPeerPort() {
+    throw new UnsupportedOperationException();
+  }
+
+  public Principal getPeerPrincipal() throws SSLPeerUnverifiedException {
+    throw new UnsupportedOperationException();
+  }
+
+  public String getProtocol() {
+    throw new UnsupportedOperationException();
+  }
+
+  public SSLSessionContext getSessionContext() {
+    throw new UnsupportedOperationException();
+  }
+
+  public void putValue(String s, Object obj) {
+    throw new UnsupportedOperationException();
+  }
+
+  public void removeValue(String s) {
+    throw new UnsupportedOperationException();
+  }
+
+  public Object getValue(String s) {
+    throw new UnsupportedOperationException();
+  }
+
+  public String[] getValueNames() {
+    throw new UnsupportedOperationException();
+  }
+
+  public void invalidate() {
+    throw new UnsupportedOperationException();
+  }
+
+  public boolean isValid() {
+    throw new UnsupportedOperationException();
+  }
+}
diff --git a/okhttp/src/test/java/com/squareup/okhttp/internal/tls/HostnameVerifierTest.java b/okhttp/src/test/java/com/squareup/okhttp/internal/tls/HostnameVerifierTest.java
new file mode 100644
index 000000000..f908fb804
--- /dev/null
+++ b/okhttp/src/test/java/com/squareup/okhttp/internal/tls/HostnameVerifierTest.java
@@ -0,0 +1,553 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to You under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.squareup.okhttp.internal.tls;
+
+import com.squareup.okhttp.internal.Util;
+import java.io.ByteArrayInputStream;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.SSLSession;
+import javax.security.auth.x500.X500Principal;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for our hostname verifier. Most of these tests are from AOSP, which
+ * itself includes tests from the Apache HTTP Client test suite.
+ */
+public final class HostnameVerifierTest {
+  private HostnameVerifier verifier = new OkHostnameVerifier();
+
+  @Test public void verify() throws Exception {
+    FakeSSLSession session = new FakeSSLSession();
+    assertFalse(verifier.verify("localhost", session));
+  }
+
+  @Test public void verifyCn() throws Exception {
+    // CN=foo.com
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIERjCCAy6gAwIBAgIJAIz+EYMBU6aQMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE1MzE0MVoXDTI4MTEwNTE1MzE0MVowgaQx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEQMA4GA1UEAxMHZm9vLmNvbTElMCMGCSqGSIb3DQEJARYWanVs\n"
+        + "aXVzZGF2aWVzQGdtYWlsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC\n"
+        + "ggEBAMhjr5aCPoyp0R1iroWAfnEyBMGYWoCidH96yGPFjYLowez5aYKY1IOKTY2B\n"
+        + "lYho4O84X244QrZTRl8kQbYtxnGh4gSCD+Z8gjZ/gMvLUlhqOb+WXPAUHMB39GRy\n"
+        + "zerA/ZtrlUqf+lKo0uWcocxeRc771KN8cPH3nHZ0rV0Hx4ZAZy6U4xxObe4rtSVY\n"
+        + "07hNKXAb2odnVqgzcYiDkLV8ilvEmoNWMWrp8UBqkTcpEhYhCYp3cTkgJwMSuqv8\n"
+        + "BqnGd87xQU3FVZI4tbtkB+KzjD9zz8QCDJAfDjZHR03KNQ5mxOgXwxwKw6lGMaiV\n"
+        + "JTxpTKqym93whYk93l3ocEe55c0CAwEAAaN7MHkwCQYDVR0TBAIwADAsBglghkgB\n"
+        + "hvhCAQ0EHxYdT3BlblNTTCBHZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYE\n"
+        + "FJ8Ud78/OrbKOIJCSBYs2tDLXofYMB8GA1UdIwQYMBaAFHua2o+QmU5S0qzbswNS\n"
+        + "yoemDT4NMA0GCSqGSIb3DQEBBQUAA4IBAQC3jRmEya6sQCkmieULcvx8zz1euCk9\n"
+        + "fSez7BEtki8+dmfMXe3K7sH0lI8f4jJR0rbSCjpmCQLYmzC3NxBKeJOW0RcjNBpO\n"
+        + "c2JlGO9auXv2GDP4IYiXElLJ6VSqc8WvDikv0JmCCWm0Zga+bZbR/EWN5DeEtFdF\n"
+        + "815CLpJZNcYwiYwGy/CVQ7w2TnXlG+mraZOz+owr+cL6J/ZesbdEWfjoS1+cUEhE\n"
+        + "HwlNrAu8jlZ2UqSgskSWlhYdMTAP9CPHiUv9N7FcT58Itv/I4fKREINQYjDpvQcx\n"
+        + "SaTYb9dr5sB4WLNglk7zxDtM80H518VvihTcP7FHL+Gn6g4j5fkI98+S\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertFalse(verifier.verify("bar.com", session));
+  }
+
+  @Test public void verifyNonAsciiCn() throws Exception {
+    // CN=&#x82b1;&#x5b50;.co.jp
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIESzCCAzOgAwIBAgIJAIz+EYMBU6aTMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE1NDIxNVoXDTI4MTEwNTE1NDIxNVowgakx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIDAhNYXJ5bGFuZDEUMBIGA1UEBwwLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoMDmh0dHBjb21wb25lbnRzMRowGAYDVQQLDBF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEVMBMGA1UEAwwM6Iqx5a2QLmNvLmpwMSUwIwYJKoZIhvcNAQkB\n"
+        + "FhZqdWxpdXNkYXZpZXNAZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A\n"
+        + "MIIBCgKCAQEAyGOvloI+jKnRHWKuhYB+cTIEwZhagKJ0f3rIY8WNgujB7PlpgpjU\n"
+        + "g4pNjYGViGjg7zhfbjhCtlNGXyRBti3GcaHiBIIP5nyCNn+Ay8tSWGo5v5Zc8BQc\n"
+        + "wHf0ZHLN6sD9m2uVSp/6UqjS5ZyhzF5FzvvUo3xw8fecdnStXQfHhkBnLpTjHE5t\n"
+        + "7iu1JVjTuE0pcBvah2dWqDNxiIOQtXyKW8Sag1YxaunxQGqRNykSFiEJindxOSAn\n"
+        + "AxK6q/wGqcZ3zvFBTcVVkji1u2QH4rOMP3PPxAIMkB8ONkdHTco1DmbE6BfDHArD\n"
+        + "qUYxqJUlPGlMqrKb3fCFiT3eXehwR7nlzQIDAQABo3sweTAJBgNVHRMEAjAAMCwG\n"
+        + "CWCGSAGG+EIBDQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNV\n"
+        + "HQ4EFgQUnxR3vz86tso4gkJIFiza0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLS\n"
+        + "rNuzA1LKh6YNPg0wDQYJKoZIhvcNAQEFBQADggEBALJ27i3okV/KvlDp6KMID3gd\n"
+        + "ITl68PyItzzx+SquF8gahMh016NX73z/oVZoVUNdftla8wPUB1GwIkAnGkhQ9LHK\n"
+        + "spBdbRiCj0gMmLCsX8SrjFvr7cYb2cK6J/fJe92l1tg/7Y4o7V/s4JBe/cy9U9w8\n"
+        + "a0ctuDmEBCgC784JMDtT67klRfr/2LlqWhlOEq7pUFxRLbhpquaAHSOjmIcWnVpw\n"
+        + "9BsO7qe46hidgn39hKh1WjKK2VcL/3YRsC4wUi0PBtFW6ScMCuMhgIRXSPU55Rae\n"
+        + "UIlOdPjjr1SUNWGId1rD7W16Scpwnknn310FNxFMHVI0GTGFkNdkilNCFJcIoRA=\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("\u82b1\u5b50.co.jp", session));
+    assertFalse(verifier.verify("a.\u82b1\u5b50.co.jp", session));
+  }
+
+  @Test public void verifySubjectAlt() throws Exception {
+    // CN=foo.com, subjectAlt=bar.com
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIEXDCCA0SgAwIBAgIJAIz+EYMBU6aRMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE1MzYyOVoXDTI4MTEwNTE1MzYyOVowgaQx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEQMA4GA1UEAxMHZm9vLmNvbTElMCMGCSqGSIb3DQEJARYWanVs\n"
+        + "aXVzZGF2aWVzQGdtYWlsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC\n"
+        + "ggEBAMhjr5aCPoyp0R1iroWAfnEyBMGYWoCidH96yGPFjYLowez5aYKY1IOKTY2B\n"
+        + "lYho4O84X244QrZTRl8kQbYtxnGh4gSCD+Z8gjZ/gMvLUlhqOb+WXPAUHMB39GRy\n"
+        + "zerA/ZtrlUqf+lKo0uWcocxeRc771KN8cPH3nHZ0rV0Hx4ZAZy6U4xxObe4rtSVY\n"
+        + "07hNKXAb2odnVqgzcYiDkLV8ilvEmoNWMWrp8UBqkTcpEhYhCYp3cTkgJwMSuqv8\n"
+        + "BqnGd87xQU3FVZI4tbtkB+KzjD9zz8QCDJAfDjZHR03KNQ5mxOgXwxwKw6lGMaiV\n"
+        + "JTxpTKqym93whYk93l3ocEe55c0CAwEAAaOBkDCBjTAJBgNVHRMEAjAAMCwGCWCG\n"
+        + "SAGG+EIBDQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4E\n"
+        + "FgQUnxR3vz86tso4gkJIFiza0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLSrNuz\n"
+        + "A1LKh6YNPg0wEgYDVR0RBAswCYIHYmFyLmNvbTANBgkqhkiG9w0BAQUFAAOCAQEA\n"
+        + "dQyprNZBmVnvuVWjV42sey/PTfkYShJwy1j0/jcFZR/ypZUovpiHGDO1DgL3Y3IP\n"
+        + "zVQ26uhUsSw6G0gGRiaBDe/0LUclXZoJzXX1qpS55OadxW73brziS0sxRgGrZE/d\n"
+        + "3g5kkio6IED47OP6wYnlmZ7EKP9cqjWwlnvHnnUcZ2SscoLNYs9rN9ccp8tuq2by\n"
+        + "88OyhKwGjJfhOudqfTNZcDzRHx4Fzm7UsVaycVw4uDmhEHJrAsmMPpj/+XRK9/42\n"
+        + "2xq+8bc6HojdtbCyug/fvBZvZqQXSmU8m8IVcMmWMz0ZQO8ee3QkBHMZfCy7P/kr\n"
+        + "VbWx/uETImUu+NZg22ewEw==\n"
+        + "-----END CERTIFICATE-----\n");
+    assertFalse(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertTrue(verifier.verify("bar.com", session));
+    assertFalse(verifier.verify("a.bar.com", session));
+  }
+
+  /**
+   * Ignored due to incompatibilities between Android and Java on how non-ASCII
+   * subject alt names are parsed. Android fails to parse these, which means we
+   * fall back to the CN. The RI does parse them, so the CN is unused.
+   */
+  @Test @Ignore public void verifyNonAsciiSubjectAlt() throws Exception {
+    // CN=foo.com, subjectAlt=bar.com, subjectAlt=&#x82b1;&#x5b50;.co.jp
+    // (hanako.co.jp in kanji)
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIEajCCA1KgAwIBAgIJAIz+EYMBU6aSMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE1MzgxM1oXDTI4MTEwNTE1MzgxM1owgaQx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEQMA4GA1UEAxMHZm9vLmNvbTElMCMGCSqGSIb3DQEJARYWanVs\n"
+        + "aXVzZGF2aWVzQGdtYWlsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC\n"
+        + "ggEBAMhjr5aCPoyp0R1iroWAfnEyBMGYWoCidH96yGPFjYLowez5aYKY1IOKTY2B\n"
+        + "lYho4O84X244QrZTRl8kQbYtxnGh4gSCD+Z8gjZ/gMvLUlhqOb+WXPAUHMB39GRy\n"
+        + "zerA/ZtrlUqf+lKo0uWcocxeRc771KN8cPH3nHZ0rV0Hx4ZAZy6U4xxObe4rtSVY\n"
+        + "07hNKXAb2odnVqgzcYiDkLV8ilvEmoNWMWrp8UBqkTcpEhYhCYp3cTkgJwMSuqv8\n"
+        + "BqnGd87xQU3FVZI4tbtkB+KzjD9zz8QCDJAfDjZHR03KNQ5mxOgXwxwKw6lGMaiV\n"
+        + "JTxpTKqym93whYk93l3ocEe55c0CAwEAAaOBnjCBmzAJBgNVHRMEAjAAMCwGCWCG\n"
+        + "SAGG+EIBDQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4E\n"
+        + "FgQUnxR3vz86tso4gkJIFiza0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLSrNuz\n"
+        + "A1LKh6YNPg0wIAYDVR0RBBkwF4IHYmFyLmNvbYIM6Iqx5a2QLmNvLmpwMA0GCSqG\n"
+        + "SIb3DQEBBQUAA4IBAQBeZs7ZIYyKtdnVxVvdLgwySEPOE4pBSXii7XYv0Q9QUvG/\n"
+        + "++gFGQh89HhABzA1mVUjH5dJTQqSLFvRfqTHqLpxSxSWqMHnvRM4cPBkIRp/XlMK\n"
+        + "PlXadYtJLPTgpbgvulA1ickC9EwlNYWnowZ4uxnfsMghW4HskBqaV+PnQ8Zvy3L0\n"
+        + "12c7Cg4mKKS5pb1HdRuiD2opZ+Hc77gRQLvtWNS8jQvd/iTbh6fuvTKfAOFoXw22\n"
+        + "sWIKHYrmhCIRshUNohGXv50m2o+1w9oWmQ6Dkq7lCjfXfUB4wIbggJjpyEtbNqBt\n"
+        + "j4MC2x5rfsLKKqToKmNE7pFEgqwe8//Aar1b+Qj+\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    // these checks test alternative subjects. The test data contains an
+    // alternative subject starting with a japanese kanji character. This is
+    // not supported by Android because the underlying implementation from
+    // harmony follows the definition from rfc 1034 page 10 for alternative
+    // subject names. This causes the code to drop all alternative subjects.
+    // assertTrue(verifier.verify("bar.com", session));
+    // assertFalse(verifier.verify("a.bar.com", session));
+    // assertFalse(verifier.verify("a.\u82b1\u5b50.co.jp", session));
+  }
+
+  @Test public void verifySubjectAltOnly() throws Exception {
+    // subjectAlt=foo.com
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIESjCCAzKgAwIBAgIJAIz+EYMBU6aYMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE2MjYxMFoXDTI4MTEwNTE2MjYxMFowgZIx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIDAhNYXJ5bGFuZDEUMBIGA1UEBwwLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoMDmh0dHBjb21wb25lbnRzMRowGAYDVQQLDBF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczElMCMGCSqGSIb3DQEJARYWanVsaXVzZGF2aWVzQGdtYWlsLmNv\n"
+        + "bTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMhjr5aCPoyp0R1iroWA\n"
+        + "fnEyBMGYWoCidH96yGPFjYLowez5aYKY1IOKTY2BlYho4O84X244QrZTRl8kQbYt\n"
+        + "xnGh4gSCD+Z8gjZ/gMvLUlhqOb+WXPAUHMB39GRyzerA/ZtrlUqf+lKo0uWcocxe\n"
+        + "Rc771KN8cPH3nHZ0rV0Hx4ZAZy6U4xxObe4rtSVY07hNKXAb2odnVqgzcYiDkLV8\n"
+        + "ilvEmoNWMWrp8UBqkTcpEhYhCYp3cTkgJwMSuqv8BqnGd87xQU3FVZI4tbtkB+Kz\n"
+        + "jD9zz8QCDJAfDjZHR03KNQ5mxOgXwxwKw6lGMaiVJTxpTKqym93whYk93l3ocEe5\n"
+        + "5c0CAwEAAaOBkDCBjTAJBgNVHRMEAjAAMCwGCWCGSAGG+EIBDQQfFh1PcGVuU1NM\n"
+        + "IEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUnxR3vz86tso4gkJIFiza\n"
+        + "0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLSrNuzA1LKh6YNPg0wEgYDVR0RBAsw\n"
+        + "CYIHZm9vLmNvbTANBgkqhkiG9w0BAQUFAAOCAQEAjl78oMjzFdsMy6F1sGg/IkO8\n"
+        + "tF5yUgPgFYrs41yzAca7IQu6G9qtFDJz/7ehh/9HoG+oqCCIHPuIOmS7Sd0wnkyJ\n"
+        + "Y7Y04jVXIb3a6f6AgBkEFP1nOT0z6kjT7vkA5LJ2y3MiDcXuRNMSta5PYVnrX8aZ\n"
+        + "yiqVUNi40peuZ2R8mAUSBvWgD7z2qWhF8YgDb7wWaFjg53I36vWKn90ZEti3wNCw\n"
+        + "qAVqixM+J0qJmQStgAc53i2aTMvAQu3A3snvH/PHTBo+5UL72n9S1kZyNCsVf1Qo\n"
+        + "n8jKTiRriEM+fMFlcgQP284EBFzYHyCXFb9O/hMjK2+6mY9euMB1U1aFFzM/Bg==\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertTrue(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+  }
+
+  @Test public void verifyMultipleCn() throws Exception {
+    // CN=foo.com, CN=bar.com, CN=&#x82b1;&#x5b50;.co.jp
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIEbzCCA1egAwIBAgIJAIz+EYMBU6aXMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE2MTk0NVoXDTI4MTEwNTE2MTk0NVowgc0x\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIDAhNYXJ5bGFuZDEUMBIGA1UEBwwLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoMDmh0dHBjb21wb25lbnRzMRowGAYDVQQLDBF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEQMA4GA1UEAwwHZm9vLmNvbTEQMA4GA1UEAwwHYmFyLmNvbTEV\n"
+        + "MBMGA1UEAwwM6Iqx5a2QLmNvLmpwMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyGOv\n"
+        + "loI+jKnRHWKuhYB+cTIEwZhagKJ0f3rIY8WNgujB7PlpgpjUg4pNjYGViGjg7zhf\n"
+        + "bjhCtlNGXyRBti3GcaHiBIIP5nyCNn+Ay8tSWGo5v5Zc8BQcwHf0ZHLN6sD9m2uV\n"
+        + "Sp/6UqjS5ZyhzF5FzvvUo3xw8fecdnStXQfHhkBnLpTjHE5t7iu1JVjTuE0pcBva\n"
+        + "h2dWqDNxiIOQtXyKW8Sag1YxaunxQGqRNykSFiEJindxOSAnAxK6q/wGqcZ3zvFB\n"
+        + "TcVVkji1u2QH4rOMP3PPxAIMkB8ONkdHTco1DmbE6BfDHArDqUYxqJUlPGlMqrKb\n"
+        + "3fCFiT3eXehwR7nlzQIDAQABo3sweTAJBgNVHRMEAjAAMCwGCWCGSAGG+EIBDQQf\n"
+        + "Fh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4EFgQUnxR3vz86\n"
+        + "tso4gkJIFiza0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLSrNuzA1LKh6YNPg0w\n"
+        + "DQYJKoZIhvcNAQEFBQADggEBAGuZb8ai1NO2j4v3y9TLZvd5s0vh5/TE7n7RX+8U\n"
+        + "y37OL5k7x9nt0mM1TyAKxlCcY+9h6frue8MemZIILSIvMrtzccqNz0V1WKgA+Orf\n"
+        + "uUrabmn+CxHF5gpy6g1Qs2IjVYWA5f7FROn/J+Ad8gJYc1azOWCLQqSyfpNRLSvY\n"
+        + "EriQFEV63XvkJ8JrG62b+2OT2lqT4OO07gSPetppdlSa8NBSKP6Aro9RIX1ZjUZQ\n"
+        + "SpQFCfo02NO0uNRDPUdJx2huycdNb+AXHaO7eXevDLJ+QnqImIzxWiY6zLOdzjjI\n"
+        + "VBMkLHmnP7SjGSQ3XA4ByrQOxfOUTyLyE7NuemhHppuQPxE=\n"
+        + "-----END CERTIFICATE-----\n");
+    assertFalse(verifier.verify("foo.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertFalse(verifier.verify("bar.com", session));
+    assertFalse(verifier.verify("a.bar.com", session));
+    assertTrue(verifier.verify("\u82b1\u5b50.co.jp", session));
+    assertFalse(verifier.verify("a.\u82b1\u5b50.co.jp", session));
+  }
+
+  @Test public void verifyWilcardCn() throws Exception {
+    // CN=*.foo.com
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIESDCCAzCgAwIBAgIJAIz+EYMBU6aUMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE2MTU1NVoXDTI4MTEwNTE2MTU1NVowgaYx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczESMBAGA1UEAxQJKi5mb28uY29tMSUwIwYJKoZIhvcNAQkBFhZq\n"
+        + "dWxpdXNkYXZpZXNAZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB\n"
+        + "CgKCAQEAyGOvloI+jKnRHWKuhYB+cTIEwZhagKJ0f3rIY8WNgujB7PlpgpjUg4pN\n"
+        + "jYGViGjg7zhfbjhCtlNGXyRBti3GcaHiBIIP5nyCNn+Ay8tSWGo5v5Zc8BQcwHf0\n"
+        + "ZHLN6sD9m2uVSp/6UqjS5ZyhzF5FzvvUo3xw8fecdnStXQfHhkBnLpTjHE5t7iu1\n"
+        + "JVjTuE0pcBvah2dWqDNxiIOQtXyKW8Sag1YxaunxQGqRNykSFiEJindxOSAnAxK6\n"
+        + "q/wGqcZ3zvFBTcVVkji1u2QH4rOMP3PPxAIMkB8ONkdHTco1DmbE6BfDHArDqUYx\n"
+        + "qJUlPGlMqrKb3fCFiT3eXehwR7nlzQIDAQABo3sweTAJBgNVHRMEAjAAMCwGCWCG\n"
+        + "SAGG+EIBDQQfFh1PcGVuU1NMIEdlbmVyYXRlZCBDZXJ0aWZpY2F0ZTAdBgNVHQ4E\n"
+        + "FgQUnxR3vz86tso4gkJIFiza0Mteh9gwHwYDVR0jBBgwFoAUe5raj5CZTlLSrNuz\n"
+        + "A1LKh6YNPg0wDQYJKoZIhvcNAQEFBQADggEBAH0ipG6J561UKUfgkeW7GvYwW98B\n"
+        + "N1ZooWX+JEEZK7+Pf/96d3Ij0rw9ACfN4bpfnCq0VUNZVSYB+GthQ2zYuz7tf/UY\n"
+        + "A6nxVgR/IjG69BmsBl92uFO7JTNtHztuiPqBn59pt+vNx4yPvno7zmxsfI7jv0ww\n"
+        + "yfs+0FNm7FwdsC1k47GBSOaGw38kuIVWqXSAbL4EX9GkryGGOKGNh0qvAENCdRSB\n"
+        + "G9Z6tyMbmfRY+dLSh3a9JwoEcBUso6EWYBakLbq4nG/nvYdYvG9ehrnLVwZFL82e\n"
+        + "l3Q/RK95bnA6cuRClGusLad0e6bjkBzx/VQ3VarDEpAkTLUGVAa0CLXtnyc=\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("foo.com", session));
+    assertTrue(verifier.verify("www.foo.com", session));
+    assertTrue(verifier.verify("\u82b1\u5b50.foo.com", session));
+    assertFalse(verifier.verify("a.b.foo.com", session));
+  }
+
+  @Test public void verifyWilcardCnOnTld() throws Exception {
+    // It's the CA's responsibility to not issue broad-matching certificates!
+    // CN=*.co.jp
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIERjCCAy6gAwIBAgIJAIz+EYMBU6aVMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE2MTYzMFoXDTI4MTEwNTE2MTYzMFowgaQx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczEQMA4GA1UEAxQHKi5jby5qcDElMCMGCSqGSIb3DQEJARYWanVs\n"
+        + "aXVzZGF2aWVzQGdtYWlsLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoC\n"
+        + "ggEBAMhjr5aCPoyp0R1iroWAfnEyBMGYWoCidH96yGPFjYLowez5aYKY1IOKTY2B\n"
+        + "lYho4O84X244QrZTRl8kQbYtxnGh4gSCD+Z8gjZ/gMvLUlhqOb+WXPAUHMB39GRy\n"
+        + "zerA/ZtrlUqf+lKo0uWcocxeRc771KN8cPH3nHZ0rV0Hx4ZAZy6U4xxObe4rtSVY\n"
+        + "07hNKXAb2odnVqgzcYiDkLV8ilvEmoNWMWrp8UBqkTcpEhYhCYp3cTkgJwMSuqv8\n"
+        + "BqnGd87xQU3FVZI4tbtkB+KzjD9zz8QCDJAfDjZHR03KNQ5mxOgXwxwKw6lGMaiV\n"
+        + "JTxpTKqym93whYk93l3ocEe55c0CAwEAAaN7MHkwCQYDVR0TBAIwADAsBglghkgB\n"
+        + "hvhCAQ0EHxYdT3BlblNTTCBHZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYE\n"
+        + "FJ8Ud78/OrbKOIJCSBYs2tDLXofYMB8GA1UdIwQYMBaAFHua2o+QmU5S0qzbswNS\n"
+        + "yoemDT4NMA0GCSqGSIb3DQEBBQUAA4IBAQA0sWglVlMx2zNGvUqFC73XtREwii53\n"
+        + "CfMM6mtf2+f3k/d8KXhLNySrg8RRlN11zgmpPaLtbdTLrmG4UdAHHYr8O4y2BBmE\n"
+        + "1cxNfGxxechgF8HX10QV4dkyzp6Z1cfwvCeMrT5G/V1pejago0ayXx+GPLbWlNeZ\n"
+        + "S+Kl0m3p+QplXujtwG5fYcIpaGpiYraBLx3Tadih39QN65CnAh/zRDhLCUzKyt9l\n"
+        + "UGPLEUDzRHMPHLnSqT1n5UU5UDRytbjJPXzF+l/+WZIsanefWLsxnkgAuZe/oMMF\n"
+        + "EJMryEzOjg4Tfuc5qM0EXoPcQ/JlheaxZ40p2IyHqbsWV4MRYuFH4bkM\n"
+        + "-----END CERTIFICATE-----\n");
+    assertTrue(verifier.verify("foo.co.jp", session));
+    assertTrue(verifier.verify("\u82b1\u5b50.co.jp", session));
+  }
+
+  /**
+   * Ignored due to incompatibilities between Android and Java on how non-ASCII
+   * subject alt names are parsed. Android fails to parse these, which means we
+   * fall back to the CN. The RI does parse them, so the CN is unused.
+   */
+  @Test @Ignore public void testWilcardNonAsciiSubjectAlt() throws Exception {
+    // CN=*.foo.com, subjectAlt=*.bar.com, subjectAlt=*.&#x82b1;&#x5b50;.co.jp
+    // (*.hanako.co.jp in kanji)
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIEcDCCA1igAwIBAgIJAIz+EYMBU6aWMA0GCSqGSIb3DQEBBQUAMIGiMQswCQYD\n"
+        + "VQQGEwJDQTELMAkGA1UECBMCQkMxEjAQBgNVBAcTCVZhbmNvdXZlcjEWMBQGA1UE\n"
+        + "ChMNd3d3LmN1Y2JjLmNvbTEUMBIGA1UECxQLY29tbW9uc19zc2wxHTAbBgNVBAMU\n"
+        + "FGRlbW9faW50ZXJtZWRpYXRlX2NhMSUwIwYJKoZIhvcNAQkBFhZqdWxpdXNkYXZp\n"
+        + "ZXNAZ21haWwuY29tMB4XDTA2MTIxMTE2MTczMVoXDTI4MTEwNTE2MTczMVowgaYx\n"
+        + "CzAJBgNVBAYTAlVTMREwDwYDVQQIEwhNYXJ5bGFuZDEUMBIGA1UEBxMLRm9yZXN0\n"
+        + "IEhpbGwxFzAVBgNVBAoTDmh0dHBjb21wb25lbnRzMRowGAYDVQQLExF0ZXN0IGNl\n"
+        + "cnRpZmljYXRlczESMBAGA1UEAxQJKi5mb28uY29tMSUwIwYJKoZIhvcNAQkBFhZq\n"
+        + "dWxpdXNkYXZpZXNAZ21haWwuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB\n"
+        + "CgKCAQEAyGOvloI+jKnRHWKuhYB+cTIEwZhagKJ0f3rIY8WNgujB7PlpgpjUg4pN\n"
+        + "jYGViGjg7zhfbjhCtlNGXyRBti3GcaHiBIIP5nyCNn+Ay8tSWGo5v5Zc8BQcwHf0\n"
+        + "ZHLN6sD9m2uVSp/6UqjS5ZyhzF5FzvvUo3xw8fecdnStXQfHhkBnLpTjHE5t7iu1\n"
+        + "JVjTuE0pcBvah2dWqDNxiIOQtXyKW8Sag1YxaunxQGqRNykSFiEJindxOSAnAxK6\n"
+        + "q/wGqcZ3zvFBTcVVkji1u2QH4rOMP3PPxAIMkB8ONkdHTco1DmbE6BfDHArDqUYx\n"
+        + "qJUlPGlMqrKb3fCFiT3eXehwR7nlzQIDAQABo4GiMIGfMAkGA1UdEwQCMAAwLAYJ\n"
+        + "YIZIAYb4QgENBB8WHU9wZW5TU0wgR2VuZXJhdGVkIENlcnRpZmljYXRlMB0GA1Ud\n"
+        + "DgQWBBSfFHe/Pzq2yjiCQkgWLNrQy16H2DAfBgNVHSMEGDAWgBR7mtqPkJlOUtKs\n"
+        + "27MDUsqHpg0+DTAkBgNVHREEHTAbggkqLmJhci5jb22CDiou6Iqx5a2QLmNvLmpw\n"
+        + "MA0GCSqGSIb3DQEBBQUAA4IBAQBobWC+D5/lx6YhX64CwZ26XLjxaE0S415ajbBq\n"
+        + "DK7lz+Rg7zOE3GsTAMi+ldUYnhyz0wDiXB8UwKXl0SDToB2Z4GOgqQjAqoMmrP0u\n"
+        + "WB6Y6dpkfd1qDRUzI120zPYgSdsXjHW9q2H77iV238hqIU7qCvEz+lfqqWEY504z\n"
+        + "hYNlknbUnR525ItosEVwXFBJTkZ3Yw8gg02c19yi8TAh5Li3Ad8XQmmSJMWBV4XK\n"
+        + "qFr0AIZKBlg6NZZFf/0dP9zcKhzSriW27bY0XfzA6GSiRDXrDjgXq6baRT6YwgIg\n"
+        + "pgJsDbJtZfHnV1nd3M6zOtQPm1TIQpNmMMMd/DPrGcUQerD3\n"
+        + "-----END CERTIFICATE-----\n");
+    // try the foo.com variations
+    assertTrue(verifier.verify("foo.com", session));
+    assertTrue(verifier.verify("www.foo.com", session));
+    assertTrue(verifier.verify("\u82b1\u5b50.foo.com", session));
+    assertFalse(verifier.verify("a.b.foo.com", session));
+    // these checks test alternative subjects. The test data contains an
+    // alternative subject starting with a japanese kanji character. This is
+    // not supported by Android because the underlying implementation from
+    // harmony follows the definition from rfc 1034 page 10 for alternative
+    // subject names. This causes the code to drop all alternative subjects.
+    // assertFalse(verifier.verify("bar.com", session));
+    // assertTrue(verifier.verify("www.bar.com", session));
+    // assertTrue(verifier.verify("\u82b1\u5b50.bar.com", session));
+    // assertTrue(verifier.verify("a.b.bar.com", session));
+  }
+
+  @Test public void subjectAltUsesLocalDomainAndIp() throws Exception {
+    // cat cert.cnf
+    // [req]
+    // distinguished_name=distinguished_name
+    // req_extensions=req_extensions
+    // x509_extensions=x509_extensions
+    // [distinguished_name]
+    // [req_extensions]
+    // [x509_extensions]
+    // subjectAltName=DNS:localhost.localdomain,DNS:localhost,IP:127.0.0.1
+    //
+    // $ openssl req -x509 -nodes -days 36500 -subj '/CN=localhost' -config ./cert.cnf \
+    //     -newkey rsa:512 -out cert.pem
+    X509Certificate certificate = certificate(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIBWDCCAQKgAwIBAgIJANS1EtICX2AZMA0GCSqGSIb3DQEBBQUAMBQxEjAQBgNV\n"
+        + "BAMTCWxvY2FsaG9zdDAgFw0xMjAxMDIxOTA4NThaGA8yMTExMTIwOTE5MDg1OFow\n"
+        + "FDESMBAGA1UEAxMJbG9jYWxob3N0MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAPpt\n"
+        + "atK8r4/hf4hSIs0os/BSlQLbRBaK9AfBReM4QdAklcQqe6CHsStKfI8pp0zs7Ptg\n"
+        + "PmMdpbttL0O7mUboBC8CAwEAAaM1MDMwMQYDVR0RBCowKIIVbG9jYWxob3N0Lmxv\n"
+        + "Y2FsZG9tYWlugglsb2NhbGhvc3SHBH8AAAEwDQYJKoZIhvcNAQEFBQADQQD0ntfL\n"
+        + "DCzOCv9Ma6Lv5o5jcYWVxvBSTsnt22hsJpWD1K7iY9lbkLwl0ivn73pG2evsAn9G\n"
+        + "X8YKH52fnHsCrhSD\n"
+        + "-----END CERTIFICATE-----");
+    assertEquals(new X500Principal("CN=localhost"), certificate.getSubjectX500Principal());
+
+    FakeSSLSession session = new FakeSSLSession(certificate);
+    assertTrue(verifier.verify("localhost", session));
+    assertTrue(verifier.verify("localhost.localdomain", session));
+    assertFalse(verifier.verify("local.host", session));
+
+    assertTrue(verifier.verify("127.0.0.1", session));
+    assertFalse(verifier.verify("127.0.0.2", session));
+  }
+
+  @Test public void wildcardsCannotMatchIpAddresses() throws Exception {
+    // openssl req -x509 -nodes -days 36500 -subj '/CN=*.0.0.1' -newkey rsa:512 -out cert.pem
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIBkjCCATygAwIBAgIJAMdemqOwd/BEMA0GCSqGSIb3DQEBBQUAMBIxEDAOBgNV\n"
+        + "BAMUByouMC4wLjEwIBcNMTAxMjIwMTY0NDI1WhgPMjExMDExMjYxNjQ0MjVaMBIx\n"
+        + "EDAOBgNVBAMUByouMC4wLjEwXDANBgkqhkiG9w0BAQEFAANLADBIAkEAqY8c9Qrt\n"
+        + "YPWCvb7lclI+aDHM6fgbJcHsS9Zg8nUOh5dWrS7AgeA25wyaokFl4plBbbHQe2j+\n"
+        + "cCjsRiJIcQo9HwIDAQABo3MwcTAdBgNVHQ4EFgQUJ436TZPJvwCBKklZZqIvt1Yt\n"
+        + "JjEwQgYDVR0jBDswOYAUJ436TZPJvwCBKklZZqIvt1YtJjGhFqQUMBIxEDAOBgNV\n"
+        + "BAMUByouMC4wLjGCCQDHXpqjsHfwRDAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEB\n"
+        + "BQUAA0EAk9i88xdjWoewqvE+iMC9tD2obMchgFDaHH0ogxxiRaIKeEly3g0uGxIt\n"
+        + "fl2WRY8hb4x+zRrwsFaLEpdEvqcjOQ==\n"
+        + "-----END CERTIFICATE-----");
+    assertFalse(verifier.verify("127.0.0.1", session));
+  }
+
+  /**
+   * Earlier implementations of Android's hostname verifier required that
+   * wildcard names wouldn't match "*.com" or similar. This was a nonstandard
+   * check that we've since dropped. It is the CA's responsibility to not hand
+   * out certificates that match so broadly.
+   */
+  @Test public void wildcardsDoesNotNeedTwoDots() throws Exception {
+    // openssl req -x509 -nodes -days 36500 -subj '/CN=*.com' -newkey rsa:512 -out cert.pem
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIBjDCCATagAwIBAgIJAOVulXCSu6HuMA0GCSqGSIb3DQEBBQUAMBAxDjAMBgNV\n"
+        + "BAMUBSouY29tMCAXDTEwMTIyMDE2NDkzOFoYDzIxMTAxMTI2MTY0OTM4WjAQMQ4w\n"
+        + "DAYDVQQDFAUqLmNvbTBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQDJd8xqni+h7Iaz\n"
+        + "ypItivs9kPuiJUqVz+SuJ1C05SFc3PmlRCvwSIfhyD67fHcbMdl+A/LrIjhhKZJe\n"
+        + "1joO0+pFAgMBAAGjcTBvMB0GA1UdDgQWBBS4Iuzf5w8JdCp+EtBfdFNudf6+YzBA\n"
+        + "BgNVHSMEOTA3gBS4Iuzf5w8JdCp+EtBfdFNudf6+Y6EUpBIwEDEOMAwGA1UEAxQF\n"
+        + "Ki5jb22CCQDlbpVwkruh7jAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBBQUAA0EA\n"
+        + "U6LFxmZr31lFyis2/T68PpjAppc0DpNQuA2m/Y7oTHBDi55Fw6HVHCw3lucuWZ5d\n"
+        + "qUYo4ES548JdpQtcLrW2sA==\n"
+        + "-----END CERTIFICATE-----");
+    assertTrue(verifier.verify("google.com", session));
+  }
+
+  @Test public void subjectAltName() throws Exception {
+    // $ cat ./cert.cnf
+    // [req]
+    // distinguished_name=distinguished_name
+    // req_extensions=req_extensions
+    // x509_extensions=x509_extensions
+    // [distinguished_name]
+    // [req_extensions]
+    // [x509_extensions]
+    // subjectAltName=DNS:bar.com,DNS:baz.com
+    //
+    // $ openssl req -x509 -nodes -days 36500 -subj '/CN=foo.com' -config ./cert.cnf \
+    //     -newkey rsa:512 -out cert.pem
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIBPTCB6KADAgECAgkA7zoHaaqNGHQwDQYJKoZIhvcNAQEFBQAwEjEQMA4GA1UE\n"
+        + "AxMHZm9vLmNvbTAgFw0xMDEyMjAxODM5MzZaGA8yMTEwMTEyNjE4MzkzNlowEjEQ\n"
+        + "MA4GA1UEAxMHZm9vLmNvbTBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQC+gmoSxF+8\n"
+        + "hbV+rgRQqHIJd50216OWQJbU3BvdlPbca779NYO4+UZWTFdBM8BdQqs3H4B5Agvp\n"
+        + "y7HeSff1F7XRAgMBAAGjHzAdMBsGA1UdEQQUMBKCB2Jhci5jb22CB2Jhei5jb20w\n"
+        + "DQYJKoZIhvcNAQEFBQADQQBXpZZPOY2Dy1lGG81JTr8L4or9jpKacD7n51eS8iqI\n"
+        + "oTznPNuXHU5bFN0AAGX2ij47f/EahqTpo5RdS95P4sVm\n"
+        + "-----END CERTIFICATE-----");
+    assertFalse(verifier.verify("foo.com", session));
+    assertTrue(verifier.verify("bar.com", session));
+    assertTrue(verifier.verify("baz.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertFalse(verifier.verify("quux.com", session));
+  }
+
+  @Test public void subjectAltNameWithWildcard() throws Exception {
+    // $ cat ./cert.cnf
+    // [req]
+    // distinguished_name=distinguished_name
+    // req_extensions=req_extensions
+    // x509_extensions=x509_extensions
+    // [distinguished_name]
+    // [req_extensions]
+    // [x509_extensions]
+    // subjectAltName=DNS:bar.com,DNS:*.baz.com
+    //
+    // $ openssl req -x509 -nodes -days 36500 -subj '/CN=foo.com' -config ./cert.cnf \
+    //     -newkey rsa:512 -out cert.pem
+    SSLSession session = session(""
+        + "-----BEGIN CERTIFICATE-----\n"
+        + "MIIBPzCB6qADAgECAgkAnv/7Jv5r7pMwDQYJKoZIhvcNAQEFBQAwEjEQMA4GA1UE\n"
+        + "AxMHZm9vLmNvbTAgFw0xMDEyMjAxODQ2MDFaGA8yMTEwMTEyNjE4NDYwMVowEjEQ\n"
+        + "MA4GA1UEAxMHZm9vLmNvbTBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQDAz2YXnyog\n"
+        + "YdYLSFr/OEgSumtwqtZKJTB4wqTW/eKbBCEzxnyUMxWZIqUGu353PzwfOuWp2re3\n"
+        + "nvVV+QDYQlh9AgMBAAGjITAfMB0GA1UdEQQWMBSCB2Jhci5jb22CCSouYmF6LmNv\n"
+        + "bTANBgkqhkiG9w0BAQUFAANBAB8yrSl8zqy07i0SNYx2B/FnvQY734pxioaqFWfO\n"
+        + "Bqo1ZZl/9aPHEWIwBrxYNVB0SGu/kkbt/vxqOjzzrkXukmI=\n"
+        + "-----END CERTIFICATE-----");
+    assertFalse(verifier.verify("foo.com", session));
+    assertTrue(verifier.verify("bar.com", session));
+    assertTrue(verifier.verify("a.baz.com", session));
+    assertTrue(verifier.verify("baz.com", session));
+    assertFalse(verifier.verify("a.foo.com", session));
+    assertFalse(verifier.verify("a.bar.com", session));
+    assertFalse(verifier.verify("quux.com", session));
+  }
+
+  @Test public void verifyAsIpAddress() {
+    // IPv4
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("127.0.0.1"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("1.2.3.4"));
+
+    // IPv6
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("::1"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("2001:db8::1"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("::192.168.0.1"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("::ffff:192.168.0.1"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("FEDC:BA98:7654:3210:FEDC:BA98:7654:3210"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("1080:0:0:0:8:800:200C:417A"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("1080::8:800:200C:417A"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("FF01::101"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("0:0:0:0:0:0:13.1.68.3"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("0:0:0:0:0:FFFF:129.144.52.38"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("::13.1.68.3"));
+    assertTrue(OkHostnameVerifier.verifyAsIpAddress("::FFFF:129.144.52.38"));
+
+    // Hostnames
+    assertFalse(OkHostnameVerifier.verifyAsIpAddress("go"));
+    assertFalse(OkHostnameVerifier.verifyAsIpAddress("localhost"));
+    assertFalse(OkHostnameVerifier.verifyAsIpAddress("squareup.com"));
+    assertFalse(OkHostnameVerifier.verifyAsIpAddress("www.nintendo.co.jp"));
+  }
+
+  private X509Certificate certificate(String certificate) throws Exception {
+    return (X509Certificate) CertificateFactory.getInstance("X.509").generateCertificate(
+        new ByteArrayInputStream(certificate.getBytes(Util.UTF_8)));
+  }
+
+  private SSLSession session(String certificate) throws Exception {
+    return new FakeSSLSession(certificate(certificate));
+  }
+}